package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.*;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

import static com.sky.constant.MessageConstant.ID_NUMBER_FORMAT_ERROR;
import static com.sky.constant.MessageConstant.PHONE_FORMAT_ERROR;
import static com.sky.constant.PasswordConstant.DEFAULT_PASSWORD;
import static com.sky.constant.StatusConstant.ENABLE;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        // 当status为0时被禁用
        if (employee.getStatus().equals(StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        String regexPhone = "^1[3456789]\\d{9}$";
        String regexIDNumber = "^\\d{17}[0-9Xx]$";
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        if (!employee.getPhone().matches(regexPhone)) {
            //手机号格式错误
            throw new PhoneFormatException(PHONE_FORMAT_ERROR);
        }
        //身份证验证，如果格式正确 || 身份证不存在
        if (employee.getIdNumber().matches(regexIDNumber) || employee.getIdNumber() == null || employee.getIdNumber().isEmpty()) {
            employee.setStatus(ENABLE);
            employee.setPassword(DigestUtils.md5DigestAsHex(DEFAULT_PASSWORD.getBytes(StandardCharsets.UTF_8)));
            employee.setCreateTime(LocalDateTime.now());
            employee.setUpdateTime(LocalDateTime.now());
            // 设置当前记录创建人id和修改人id
            employee.setCreateUser(BaseContext.getCurrentId());
            employee.setUpdateUser(BaseContext.getCurrentId());

            employeeMapper.insert(employee);
        } else {
            throw new IdNumberformatException(ID_NUMBER_FORMAT_ERROR);
        }
    }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> p = (Page<Employee>) employeeMapper.selectList(employeePageQueryDTO.getName());
        return new PageResult(p.getTotal(), p.getResult());
    }

    /**
     * 启用/禁用账号
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //使用构造器构建一个employee对象，并且将status和id
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.updateById(employee);
    }

    /**
     * 员工查询回显-根据ID获取信息
     *
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.selectById(id);
    }

    /**
     * 更新员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void updateById(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateById(employee);
    }
}
